[alsa-devel] [PATCH] ak4642: show error if register write fails

[Lars-Peter Clausen]

On 03/11/2014 03:17 PM, Ben Dooks wrote:
> On 11/03/14 13:59, Lars-Peter Clausen wrote:
>> On 03/11/2014 12:21 PM, Mark Brown wrote:
>>> On Tue, Mar 11, 2014 at 11:18:30AM +0000, Ben Dooks wrote:
>>>> On 10/03/14 23:40, Mark Brown wrote:
>>>
>>>>> Two things here.  One is that this should be a dev_err() and the other
>>>>> is that if this is worth doing shouldn't it just be in the core - I see
>>>>> nothing driver specific here?
>>>
>>>> Sorry, didn't see a device in "struct snd_soc_codec *codec" so I went
>>>> for a printk (although it was pr_info instead of pr_err).
>>>
>>> codec->dev.
>>>
>>>> If you think that changing the two snd_soc calls to print errors
>>>> when anything bad happens then that would also be a good idea then
>>>> I can send a patch for that.
>>>
>>> That would be better, yes.
>>
>> In my opinion it's better to pass the error on to the upper levels. E.g.
>> if userspace opens the PCM device and there is an IO error in the
>> startup callback then that error should be passed on to the userspace
>> application rather than doing a out of band error reporting and adding a
>> entry to the kernel log.
>
>  From a grep, there doesn't seem to be much in the way of error
> checking in a number of the codec drivers.
>
>

That doesn't mean it's the right thing to do no error checking ;)